@misc{indiciaeda405a120b4a,
  title = {Design and implementation of a sampling strategy for a water-quality assessment of the Potomac River basin},
  author = {J. M. Gerhart and J. W. Brakebill},
  year = {1996},
  doi = {10.3133/wri964034},
  url = {https://pubs.usgs.gov/publication/wri964034},
  note = {Source identifier: wri964034}
}